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Round|Lab Grown|IGI

1.17ct I SI1 Round Lab Grown Diamond

EX • I/SI1 • IGI LG436072537

Shape and cutting style on the report: Round brilliant

Certificate IGI LG436072537

Diamond specifications and retailer prices

From £278 GBP
$373 USD
As of November 1, 2026
Save £524 GBP (65%) vs most expensive(unlock to see where)
5 retailers carry this diamond
Most expensive: £803 GBP at MOH London · As of October 26, 2026
View at MOH London

About this 1.17ct lab-grown round diamond

This 1.17ct lab-grown round sits in the classic one-carat band, graded I colour (near-colourless) and SI1 clarity (slightly-included), with a top-tier cut grade and certified by IGI LG436072537 or 436072537. Listed at 5 retailers as of October 26, 2026, with prices from £278 to £803, a £524 spread on the same certified stone. MOH London lists it at £803. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.17
Carat
I
Colour
SI1
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36.1°
Pavilion angle41.3°
OriginLab Grown
Grading LabIGI
CertificateIGI LG436072537
Dimensions6.70 × 6.67 × 4.20 mm
L/W Ratio1.00
Girdle conditionFaceted
Culet sizePointed
Cert comments
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Top View
6.70 mm6.67 mm1.17 ctI / SI1
OriginLab Grown
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateIGI LG436072537
Side View
Table 59.5%Crown 36.1°Girdle: MED-STKPavilion 41.3°Culet: NoneDepth 62.8%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
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See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Nov 1
Current: £803 GBP|Low: £260 GBP|High: £811 GBP|Avg: £467 GBP
MOH London
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
October 25, 2026
Retailer 3£278 GBP
Retailer 2£313 GBP
Retailer 5£346 GBP
Retailer 4£396 GBP
Retailer 6£666 GBP
MOH London£803 GBP

12 data points across 6 retailers

5 retailers£278 GBP to £803 GBP

A
Cheapest Retailer
-
£278 GBP
$373 USD
A
Retailer 2
-
£313 GBP
$420 USD
View
A
Retailer 3
-
£346 GBP
$464 USD
View
A
Retailer 4
-
£396 GBP
$531 USD
View
Most Expensive
A
MOH London
LG436072537 · Oct 26
£803 GBP
View
4 more retailers have this diamond
Prices start from £278 GBPSave up to £524 GBP

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.17ct Round
£278 GBP